1091713385 has 12 divisors (see below), whose sum is σ = 1523943108. Its totient is φ = 748603296.

The previous prime is 1091713373. The next prime is 1091713387. The reversal of 1091713385 is 5833171901.

It can be written as a sum of positive squares in 2 ways, for example, as 765296896 + 326416489 = 27664^2 + 18067^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1091713385 is a prime.

It is a super-2 number, since 2×1091713385² = 2383676229976316450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091713387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2227742 + ... + 2228231.

It is an arithmetic number, because the mean of its divisors is an integer number (126995259).

Almost surely, 2^1091713385 is an apocalyptic number.

It is an amenable number.

1091713385 is a deficient number, since it is larger than the sum of its proper divisors (432229723).

1091713385 is an equidigital number, since it uses as much as digits as its factorization.

1091713385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455992 (or 4455985 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1091713385 is about 33041.0863168873. The cubic root of 1091713385 is about 1029.6814250254.

The spelling of 1091713385 in words is "one billion, ninety-one million, seven hundred thirteen thousand, three hundred eighty-five".